Oil burner



April 14, 1925.

B. w. HURD OIL BURNER Filed Jan. 12. 1924 INVENTOR.

BY Wm. 3

' A TTORNEYS.

Patented RENE-BMW W. HURD, OF .SAN FRANCISCO, CALIFORNIA, ASSIGNOR T TURBINE FUEL 01L BURNER 00., OF SAN FRANCISCG, CALIFORNIA, A CQRPORATION OF NEVADA.

on. 13mm.

Application filed January 12, 1924. Serial No. 685,868.

.To all whom it may concern:

Be it known that I, BENJAMIN W. Hum), a citizen of the United States, residing at city andcounty of San Francisco, and State 5 of California, have invented certain new and useful Improvements in Oil Burners, of

which the following is a specification.

The hereinafter described invention relates to an intensifier for the pilot light used in Connection with small oil burners of that type adapted to 'ght up or ignite larger gas or vapor burners, but is designed more particularly to heavy fuel or crude oil burners, which, when cold, require a much better flame to ignite the stream of oil vapor discharging therefrom. In the use of this type of burners it is appreciated that the air and oil vapors must be heated before the oxygen in the mixture will properly combine with.

the oil vapor for'the production of required combustion. The gas which is usually used in a pilot light employed or associated with said burners, as furnished from the city service, hasnot a pressure suflicient to penetrate the stream of oil vapor issuing from a heavy oil burner and by reason of this faillife it is somewhat dangerous in the use of oil burners having associated therewith a gas pilot light to depend upon the city pressure of the gas for ignition of the gaseous vapors projected from the burner.

' The object of the present invention is. to obviate the difiiculty heretofore experienced relative to the use of the gas pilot light as associated with oil burners, so that at all times dependence may be given to the pilot 1 lig t for-proper ignition of the stream of oil and vapor projected from the burner; this object being attained by combining .an air blast with the lighting gas of the pilot light in such a manner that the air surrounds the lighted column and furnishes the additional ogzygen for perfect combustion. The higher .alr pressure thus provided for makes a longer pilot flame and one of greater intensity which ,penetrates the stream of vapor projected from the oil burner and properly ignites the said vapor.

.To comprehend the. invention reference should be had to the accompanying sheet of drawings, wherein- ,1 r

Fig. 1 is a perspective view partlybroken away illustratin the oil burner in firing position within a rnace, with the pilot light the burner oration thereof.

and pilot light intensifier partly broken away.

Fig. 2 is an enlarged sectional elevation of the pilot light intensifier.

In the drawings, the numeral 1 is used to designate an ordinary oil burner mounted for swinging movement relative to a furnace structure 1 which receives air from the air service ipe 2, oil being admitted into ody 1 through the oil supply pipe 2. With the burner is associated a pilot light structure 3, which receives gas from the valve controlled gas supply service pipe 3'. These parts are of the usual construction and call for no specific description as to construction or working thereof,

' such being well understood to those conversant with oil burners, the mounting and op- Associated with the pilot light structure is an intensifier comprising in the present case an intensifier barrel 4 secured to and projected longitudinally from an intensifier elbow 5, into which air is admitted under pressure through the pipe connection 5' which establishes communication between the interior of the elbow 5 and the air service pipe 2. Through the elbow and projected within the intensifier barrel 4 is extended an intensifier gas guide pipe 6, the inner end of which is supported by what I shall term an air nozzle plate or diaphragm 7, said 35 plate or. diaphragm closing the intensifier elbow 5 and being provided with nozzle apertures or holes 8 for the outflow of air under pressure from within the said elbow into the intensifier barrel 4 forintermixture with the flame of the pilot light projected through the guide pipe 6 into the barrel 4. The flame of the pilot light 3 projected into the barrel 4; is surrounded by the air flowing under pressure into the said barrel 4 through the nozzle outlets or openings 8 in the plate 7 and causes the flame projected from the end of the barrel 4 to impinge against the stream of oil vapors flowing from the burner 1 and ignite the said vapors for the produc tion of the required flame within the furnace. The flame of the pilot light through the use of the intensifier is much hotter than the one ordinarily produced from the cient to penetrate the said stream of vapor flowing'from the burner 1.

This relative positioning of the pilot burner and intensifier and main feed burner inangular relation to cause an intersecting of the issuing streamsis one of the principal advantages of the present invention, as it has been discovered that the gas flame containing considerable air on intermixing with the oil flame supplies additional oxygen to the oil flame and assists in combustion of the unburned particles of fuel oil issuing from the main burner, materially reducing carbon and increasing the temperature of the flame.

In use of the burner 1 which is swingingly mounted relative to the furnace structure 1", the pilot light is burning at all times with a low flame. forward for the projection of its inner end within the combustion chamber of thefurnace, the gas to the pilot light, as usual with this class of burners is automatically turned on full. The increased flame of the pilot light produced thereby is projected through the intensifier gas guide pipe 6 into the in- As the burner is rockedtensifier barrel 4 and is surrounded by the air admitted into said barrel under pressure from the elbow 5 through the nozzle openings or outlet ports 8 of the diaphragm 7 The pressure of the air jets admitted into the intensifier barrel 4 co-acting with the increased flame of the pilot light, projects the same beyond the end of the barrel 4 and against the stream of gaseous vapor flowing from the burner 1 and insures ignition thereof.

While I have illustrated and described a preferred embodiment of the invention, I do not wish tobe understood as limiting or re- 7 stricting myself to the details of construction herein shown and described, but wish to be understood as claiming as broadly as the state 'of the art will warrant the associa-j 'ters Patent, is:

1. Th combination with an oilburner, of

an automatically controlled pilot light structure associated therewith andvdisposed to cause the flame therefrom to intersect the flame issuing from the oil burner, and including an intensifier barrel arranged in advance of the pilot light structure, a tube for guiding the flame of the pilot light into the intensifier barrel and means for admitting air under pressure into the barrel of the intensifier for intermingling with the projected flame of the pilot light and projecting the same beyond the intensifier barrel for impingement por issuing from the burner.

2. In combination with an oil burner, an oil supply pipe leading thereto, an air supply pipe leading to the burner, a gassupply pipe, a pilot burner connected therewith. and disposed to cause the flame issuing therefrom to intersect the flame issuing from the main oil burner, an intensifier barrel surrounding the pilot burner and into the inner end of which the pilot burner discharges, intensifier barrel in rear of the discharge end of the pilot burner, the end of the pilot burner terminating adjacent the rear end of the intensifier barrel, and a connection from the air pipe to the intensifier barrel in rear of the bafiie.

In testimony whereof I have signed my name to this specification.

- BENJAMIN W. HURD.

against the stream of vaa baflle within the rear end of the I 

